Insulating means



Patented Sept; 14, 1943 l claims, (015211569X This invention relates toimprovements vfin-:line` sulating means, and more particularly insulation v for closures of cold storage'containerspsuch' as bodiesof refrigerator and similar motor trucks; f

as Well as refrigerator cars {forrailwaya Y One 'object of the invention is-tok provide;means for insulating doors `or similarclosures .ofc'old storage containers, so designed? as to jeifectively' -seal the crevices between the-closureand fthe walls of the opening whichthefclosurefits'andv thereby prevent'lossfof refrigerationldue to seepage. 1 'if A more specific" objectfoffthe invention is -to provide an insulating.stripy of vruggeddesign adapted to be compressed between! the edgesjof `the. closure and ythe'r opening closed rvthereby, lto

. provide attight sealbetweenfthe same',-wher'ein thel strip is .hinged along one edgeand spring` f .projected to .assurefproper: sealing. i

L Another object ;of the4 invention" is :tof provide 4an insulating stripcomprising a solidy core which :maybeinzthe formoffia ystrip of Wood lor-similar material, a .strip f .off quilting ror ipaddinggover lying vand. enclosing said. core,*1and a strip` yof A'canvas overlyingthe.-.stripof quilting; wherein' fthe str-ips of .quiltingmn'd canvasare of a .Width .greaterthanitheistrip offniate'rial forming vthe `core/to extend fbeyond'thevoppositle fsi'dewedges `o1 :the core .andprovidejaps forseouring .the composite stripsinplace; i f

, f A still further objectV of theinventionjis toy pro- ,7:3 .vide aninsulating strip asspeciiied infthe prfe-A ceding paragraph, adapted tobe secured'to. either'1 ofthe cooperating engaginged'gerportions ofthe l `v closure or wall `oi lthe closure ,opening,bynai1ing strips for clamping theaps of `lthe strip,.`applied tion,. :Figure v1. horizontal fsectionalwxticii through a hinged double doergaid110er` frafrugnf f ak container such. as' the :body of zafrefrigeratpr 1 railway car; :illustrating myimpr'ovements incone 'g :1% nection'tnerewitntheldoor `being `shown broken;

'i and* the. frame` :partly broken raway Lto1ecomm0r ydate the yvieri/ato `the sheet of sthetdrawing. Figure 2vis a :vien/similar toilgure 6:1, an enlarged eenstrucnonrhinsulation g i y Walls qnt-he c 1L l w11@ in contact zwith fthe inshlatam provided with the usua Aa `rpair or :hinged ,doors 1412 l 3 are 'suitably s insuch amanner thatvfone ofsaid'flaps actsfias a .hinge von which thegzmainbody portionyof the vstripfis swingable and vtheother flap'acts as an' anchoring means; permitting an 7 amount Aofl freedom of movement` of l'the strip fto'perrnitmhle required swinging movement onits hinged Lcon- .nection, the strip being yieldinglyrbacked byla (spring to project the-same. i,

Yetfanother object rof the inventionis `to;prc' vide an insulating, strip :forA a .closure `Vo'ff gafrefrigA erator bodyr adapted gto be accommodated .in a vgroove Aor pocket-in theA memberA tofwhihlit is` attached, so designed and; arrangedr` Aas 'to' avoid LtheicooneratingfedeejacergofLthegothermembgz.. r i' Y' vthe `fo'rmationfofair-@pockets ,between the .,strip 7 yand the back wallzof thegroove'within kwh'ich'lit 4is accommodated. l y, Other objects of the invention willmoreclearly appear iromthe descriptionfand claims .hereyinafter following. Y Y n In the draWingiforming-alpart.of-this specificai v thereofh byv Whichit is secured in place tog-the edgegzface' of .one membenfbing:,engaeeahle b y fpnoridedginetheemeer member wvlnthat -iss ec.ured." ,Aszshon'a ,Iignrelggthe miembe daer.'

my x

erate with the strip of insulating `material A of my, improvements, these grooves Ywhich are indicated by G-G, are made o f the shape shown in the drawing and hereinafter more specifically de-v scribed.

The `strip A is clamped within the groove G by means'of the nailing strips E and F which may be of wood orr4 any other` suitable material.

The composite' strip A is formed bythe layers of canvas D-D and padding C-C which enclose the core B. The core B is in the form of anj elongated wooden strip or loar'hf` oblongcrossy ysection, havingthe opposite side edges rounded 01T, as indicated at |8-.-I'8.` I'he core -Bisem` braced `by the layers of padding or quiltingC-O which overlie the front and rear sides of the core wall ofthe groove; G. y Thisfspring is seated in` *the pocket'22 and bears onthe rear side of the a and extend laterally outwardly.y beyondithe rounded side end edges l8-I3 thereof. These extended portions provide flaps of two ply thick" ness; as clearlyshown inthe drawing. `The layersof canvas DfD are ofthezsame Width as the layers ofvquilting C--Cand overlie and enclose layers D--D which overlie the projecting' :flap portions ofthe layers C-.-C form, together with thelatter, `flaps. I6 and 1.1/ ofthe composite strip ther-latter therebetween--V The portions ofv the" A. These flaps of thefstrip Afare thus of fourY plyithickness. The plies of material of theV flaps I6-.and I1 "arestitch'edtogether, as indicated at l 9-1 Band shownrby dash'lines to hold thefparts assembled, the stitches preferably runningvin [rows lengthwise of said ilaps.- As shown-clearly in the-drawing,- theilap I.'|;of the strip `Alisof considerablygre'ater.width thanthe fiaplE. The

portionfof the "strip ybetween' the flaps I6l and l1,

` whichco'ntains the core B, lforms a thickened sectionory bulged portion 20, which is the main' toclyof the strip..-

shownmostvclearlyin Figures2 and-3the 1 groove yG is relativelywide and has "thelinneror back wall thereof, which-iisindicated byv2li, pro

videdffwithfa. pluralityl of pockets,-only one! of whichA is shownfin the'drawing.-V The pockets 22 jare preferably? arranged in `arow lengthwise of the groove, being spaced' apart any suitable dis:-

" j tance-found expedient! -Each pocket-Mis slightly inclined', `as-shown most clearly in Figures 2 and 3,

' andfformsfa seatrfor` one o fthe backing Vsprings The back wall 2| lof thegroove G is substantiall'ys'traighttofone'side of `the pocket22, said straight; wall'- portion being indicated byv 23,and -is`y located above the pocket k22, as seenv in Figures 2 and 3; TQtheOtherside of the pocketfadjacenb thereto and inwardly of the corresponding side 1 wall of the grooveG, thelback wall`2lis cut" back, asjfindicated at .24. Laterally outwardly-.beyond 'the cutfback` portion or section 24, theportion iofthe back wall adjacent the corresponding 'side `wall of the groove is 4substantially flat; `as indicated ati25,y said vflat portionbeing in the same Thecomposite strip of :insulation A is disposed within the groove Gand hasthe'flaps .I'S and l1 thereof clamped in place by the Anailingstrips.'E

hold 'the flaps rmlyagainstthe yback wall por.-

.f'tionsf23fand `25` ofthe groove.. As shown inY the "drawing, ftheistripsE and Fare securedat inter.-

`valsby nails extending tnrouehqsaidfstrips,.the

into the material of the wall to which the strip 'indicated at '26,fora purpose hereinafter pointed and F-,'-whichare of rectangular cross` section and .A is secured. As shown most clearly in Figures 3 and 4, the ilap I6 of the strip A isy clamped in such a manner that there is but slight clearance .between the outer side face of the nailing strip E and the enlarged main body portion 20 of the insulating. strip, while the flap I1 is clamped in 'such a manner that c :gm'siderable clearance is. provided between the .nailing strip F, and the en-` largement 20 of the strip A,`and a certain amount `.of slack isl present in the'unclamped portion of said flap.

'The spring H forms means for yieldingly resistingmovement of the strip toward the back strip A tonormally'l hold and'maintain the latter -yieldingly projected from thegroove G, as shown in Figure 3. As will be understood, any desired vLnumber of springs, found necessary, may be ernplo'yed to yieldingly back .the stripY A. VThese springs` are preferablyseoured to the strip by staples4 21 or other similar suitablesecuring elef ments.l

When thedoor is lswung to closed position, as illustrated in Figuresfl 4and 2, theinsulating strip A isforced or pressedinwardlyfof the groove Gagansttine resistanceqof the springH, the required hinging movement of` the strip being perrnittedgby-the flexibility of the` flap |6Which functions as `ahinge.` Alilnen vthe doorhas been fully closed the strip Ais forcedagainst the surface fof the cut-out section .24,and the curved portion 26 "of theback wall ZI'of tnegroove Gv andzcompressed'between said'back wall and the edgefaceof `therdoor, to tightly seal `the crevice between `the-edge vof the Ydoor .and the .wall yof the door opening.. As. will befseenin Figure 2,

the` parts are solproportioned that in thetightly closed position of the?` door,;-t heenlarg.edg main body portion 20 of` tll'esiealingcstrip still protrudes outwardly or the grooVe'G beyond the edge face of the wall l5 ofthe .door opening,vthus assur-` ing .compression i of the, insulating strip 'against f l `the back-,wallgoiD .the grooveG to. `close *thefspace- 7 betweenthe. back of the insulatingv strip adjacent the hinge flap I6. `Inthis connection itis pointed out vthat,-dueto the rhingingJ-jrrrovement of the strip A in swinging on lthe hinge ap` I6. and due to the `ilexibility of saidap, iseating" of the hingedend `oftlie"strip"A on the concave wall :portion'' offthegroove' .G is assured `at an early stage in the application" of. pressuretosaid Tinsulatingfstrip. This positive contact oil theV strip with" lthe back wall ":of..=the groove G lis' assured even-.if "the door isfslightlyover lorundersize with `respect fto- .the dooropeninggfbec'ause in assum`- ing` variousfangular positions of. itsv hing'ing movement to-aoco'rnrnodate itselfto variations'in `siz'ev'vith respect to the dooropen'ing, `thefsealing strip vA has continuous ycontact -with the back wall of `the groove G, inasmuchas yitis forced to rock on the concavely curved portion. 26 .of the back Wall "of :the groove-TG., Thus, air pockets lare avoided in back ofthe vinsulating strip which ythe latter` from said groove edge face opposed to the` edge'face of the closure r member when the container is closed, the edge y f face of one ofsaid members `having a longitudinal groove; a composite stripof insulation having an `enlarged central main body portion and flexible flaps extending from opposite sides of said body portion, said stripl ,being seated in said groove; vmeans for securing said strip to said grocved member by said flaps, one of said flaps being'secured-'relatively close to 'said main body` groove, `said strip including an enlarged central,v

main-body portion containing a solid core of ma'- j terial and flexible strips ofA flexible sheet'mate'- `rial overlying the iront and rearsides of said r2,329,358A D f o 3-v tudinal, groove, said groove having a back wall; a; compositeV strip of insulation seated inr said core and enclosing the same, said strips of flex- 4 ible material extending beyondthe side kend portion to provide hinging onk said -flap, the other nap having a predeterininedamount off` slack between said main body portion andthe point atvwhich it is secured to permitalimited swinging i movement on said hinge flap;`v and 'spring meansV ing a-concavely rounded surface with which sai/d edges of said corein face torace contact with each other and forming securing flaps; means rfor securing one of said'iiapsto the member having the groove, closely to saidcore, to provide hinging action,said back Wallfof the groove havenlarged centralportion of the strip has `rocking engagement'atthe hinged, edgethereof; means backingsaid mainbody portion to` partly project ,s

2. In means forinsulating closures'of containers, the combinationfwitna closure member having an edge face; of amemberhaving an redge ible strip material enclosing said core and having naps extending from opposite side end edges of the core, said ilaps having the strip portions thereof in overlying face to face` contact, saidl composite strip being seated in" said groove; nailing strips secured to the membery having the groove and clamping said iiaps to said'last named member, one of said nailingstrips rclamping kthe corresponding ap close to said core to' provide hinge means, and the other nailingstrip clamping the other-flap remote from said core to pro-'- vide apredeterminedamount of slack 'in said apto permit inward andfoutward movement of the core portion of "the composite strip about its hinged flap;'and`spring means normally partly projecting saidcoreportion .of thecomposite,

strip` outwardly of said groove.v

for securing the other ap of said strip *tothe-Yy memberjhaving the groove, at a point rremote from the core, to provide acertain amount "of` n slack in said `last named flap to permitswinging s y l n movement of said strip onthehinged connection y,

' thereof; and means for yieldingly projecting said 3. In means for insulating closures of containi ers, the combinationwith a closurey member having an edge face; of a member` having' 1an edge face opposed to the edgexfacefof the closure member when the container is"c`losed, .the edge face of one orsaid membersk havingfalongi- 'enlarged portion of` 'theA strip outwardly ofthe groove away from the rmember having theigroove toward the other rof said members. 4. Inmeans' for insulating Iclosures of containers, the combinationwith ak closure member having an edge face; yof a member having anvs, edge yfaceopposed to the edge `face ofthe closurey member when the container is closed, 'the edge face of one of said members having a longitudinal groove; a composite sealing strip of insulation including an enlarged central portionfof oblongv transverse"t cross section 'having lone of the side end edges rounded,-said strip including exible securing naps extendingfrom opposite]y side ends of said enlarged portion, saidstrip lbe-v ing accommodated in said groove, said: groove vhavinga back wall provided Withfaconcavely curved bearing surface on which said rounded'k edger of the enlarged portion of the strip rocks;

.means for anchoring the liiaps of said stripfto the member having 'the groove; and spring means in said groove in back of the enlarged portion of the` strip Nyieldin'gly holding said enlarged portion ofthe strip partly. projected from the groove. y t l c RQLAND J. OIKJAITDEIR.I 

